diff --git a/lnst/Tests/__init__.py b/lnst/Tests/__init__.py
index f7c6c90..a39b6f4 100644
--- a/lnst/Tests/__init__.py
+++ b/lnst/Tests/__init__.py
@@ -12,8 +12,26 @@
 olichtne@redhat.com (Ondrej Lichtner)
 """
 
-from lnst.Tests.Ping import Ping
-from lnst.Tests.PacketAssert import PacketAssert
-from lnst.Tests.Iperf import IperfClient, IperfServer
+# from lnst.Tests.Ping import Ping
+# from lnst.Tests.PacketAssert import PacketAssert
+# from lnst.Tests.Iperf import IperfClient, IperfServer
+import importlib
+
+lazy_load_modules = {
+    "Ping": "lnst.Tests.Ping",
+    "PacketAssert": "lnst.Tests.PacketAssert",
+    "IperfClient": "lnst.Tests.Iperf",
+    "IperfServer": "lnst.Tests.Iperf",
+}
+
+
+def __getattr__(name):
+    if name not in lazy_load_modules:
+        raise ImportError("Cannot import {}".format(name))
+    mod = importlib.import_module(lazy_load_modules[name])
+    globals()[name] = getattr(mod, name)
+    return globals()[name]
+
+
+# #TODO add support for test classes from lnst-ctl.conf
 
-#TODO add support for test classes from lnst-ctl.conf